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Status Future consideration
Workspace IBM Copy Services Manager (CSM)
Created by Guest
Created on Mar 7, 2025

RELATED IDEAS

IBM Copy Services Manager (CSM) should be differentiate between real HOST-Connections issues vs. a planned shut down from one or more HOST systems.

Starting with CSM 6.3.10 IBM has introduced his Multi Sysplex Support (feature 87578b). With this feature are several resilience topics addressed to make the tool less prone to incorrect operation. One decision that has been made, for example, is that the HyperSwap Command isn’t available at the GUI when one HOST-Connection is in disconnected status. The design is, that a planned HyperSwap shouldn’t be supplied to the customer to prevent him to do any failures during a loss of one HOST-Connection. A second observation with an interrupted HOST-Connection was that all MM FO/FB Sessions which are enabled for Hardened Freeze Operations go to severe status (IWNR7008E).

For a real communication issue scenario like HOST-connection is dropped but the z/OS LPAR still runs this enhancement is good solution to prevent customers for incorrect operations. However, more and more regulatory requirements come up that a customer should provide a proof that he can handle its workload if one (ore more) z/OS LPARs aren’t available. Such evidence must be provided over several days or even weeks are possible. For this timeframe it is a “normal situation” that a HOST-Connection is in disconnected status.

The IDEA should address this requirement that CSM is able to distinguish between an Outage of the HOST-Connection vs. a planned shut down from one LPAR. If one LPAR left the Sysplex CSM should ignore this/these HOST-Connection(s) and should enable the HyperSwap Command for HS managed Sessions. And as well the regain HSIB Connection behavior should also be enhanced, that MM FO/FB Sessions also go back to “normal status” when the connection lost to one HOST is a planned situation like described above.

Idea priority Medium
  • Guest
    Feb 20, 2026

    Our company could greatly benefit from this IDEA as soon as possible. 

    Anytime we shut down our test system (which can happen multiple times a day, or every few weeks), the SGC functionality within the CSM environment fails & becomes unusable until we are able to perform a full restart of the CSM services. 

    For context, we have 3 zOS connections in CSM, one going to each of our 3 zOS LPARs (which share DASD) - so it's a very unusual design choice that IPLing one LPAR would take out the entire SGC functionality, as opposed to allowing the connection to fail over to one of the other active LPARs, or to have CSM continue to attempt to re-establish connectivity.

    It is worth noting, that following a restart of CSM services it takes close to an hour before CSM fully regains functionality and is able to perform scheduled SGC Backups again.

    Improving CSM so that it can 'self-recover' connections that have been lost due to regular Mainframe activities (such as an IPL of a singular LPAR), would remove a large manual effort from customers that are stuck trying to recover the environment. 

    Additionally, providing customers with a way to see which zOS Connection is the "Master" and the option to swap that role to a different zOS connection, is one I hope IBM will consider.

    Reply

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